Apparatus for converting direct currents of low voltage into direct currents of highvoltage



E. REISZ.

APPARATUS FOR CONVERTING DIRECT CURRENTS OF LOW VOLTAGE INTO DIRECT CURRENTS OF HIGH VOLTAGE APPLICATION FILED .IUIIE 25,1915.

' 1,418,023. t d May 30, 1922.

705%? e sls e (S fizz/enfor- WW K/YMZ UNITED STATES PATENT OFFICE.

' EUGEN msz, OI 'I'BEP'IOW, NEAR BERLIN, GEM.

.AIIfAMTUS FOR CONVERTING DIRECT CURBEN'I'S 01 LOW VOLTAGE INTO DIRECT- CUBBENTS 01 HIGH VOLTAGE.

Specification of Letters Patent; Patented May 30,

Application filed June 25, 1915. Serial 1T0. 86,806.

unwrap umma ran rnovrsrons' or manor or uaacx a, 1921, 41 arm. n, ma.

To all whom it my camera:

Be it known that I, EUGEN Rnrsz, an engineer by occupation, subject of the Emperor of Austria, residing at No. 17 Moesdorferstrasse, Treptow, near Berlin, Germany, have invented certain new and useful Imrovements in Apparatus for Converting Birect Currents of Low Voltage into Direct Currents of High Voltage, of which the following is a specification.

I This invention relates to apparatus for converting direct currents of low voltage into direct currents of high voltage, and has for its object to provide a new apparatus whereby the use of rotating transformers or of electrical valves is avoided while the voltage of the direct current produced will be wholly or nearly uniform.

The apparatus is mainly designed for such uses in which a direct current of very high voltage but of small power is required, as

for instance for working discharge tubes, for

charging hi h voltage batteries, for'measuring, and'li e purposes. diagram-illustrates one embodiment of the invention.

e designates an electromagnet positioned in the circuit of a source of direct current I), and a is the armature of said magnet, con trolling three contacts [0 k, 70 rangement of these contacts is such that the armature switch breaks its engagement with contact k before breaking its engagement with contact In.

When the armature a is attracted by the energization of magnet e, the contact at k is first broken, thus causing generation ofan induction current volta e inthe winding of the electromagnet e which is of suitable dimensions- By means of this inductively generated voltage the v condenser c- ,is charged, the engagement with contact is being broken after such charging. By suitably selecting the conditions, it is possible to cause the disengagement of the contact is only after the charge of the condenser c has been completed.

The subsequent engagement of the armature switch a with contact It connects the condenser 0 directly with the condenser 0 whereupon a discharge of the latter and a charging of the first-named condenser a will The drawing in The arthrough the same, thechoking' coil acting in such'a manner that the charging current of the condenser will be almost constant.

'When the return movement ofthe armature switch a is effected by the spring to which it is attached, which causes are-em gagement of the same with contacts 70 and le the condenser 0 is first short-circuited and thereby completely dischar d whereupon the cycle of operations descrl ed is repeated. If the inductance of the electromagnet e and the capacit of the condensers be properly selected a direct current voltagemay be generated at the terminalsof the condenser 0 which will be from 50 to 80 times higher than the voltage of the source of direct current.

It is to be understood that the contacts must be adjustable and that proper adjust ment of them must take place, whereby the sparkless working of the apparatus may be obtained, as the current interruptions may take place at a moment in which no current passes the contacts. To avoid oxidation and soiling of the contacts it will be advisable to use a 1i uid such as oil as a surrounding medium or the interrupter contacts.

Instead of the interrupter device as hereinbefore described, any other analogous or suitable interrupting means may be used without departing from the scope of the invention.

Cllaims: I

1. Means for converting direct currents of low voltage into direct currents of high voltage consistin of a circuit containing a source of low vo tage current, a self induction coil and a circuit breaker, a condenser, a switching device in connection with said circuit breaker and the condenser, said switching device connecting the condenser with the circuit when the latter is opened by the circuit breaker and breaking the connection after a short period, a second condenser and a second switching device, the 1 the first one after it has been disconnected from the circuit by the first switching device, and a coil having ohmic and inductive resistance to cause a uniform discharge of high voltage direct current from the second condenser immediately after it has been loaded.

2. Means for converting direct currents of low voltage into direct currents of high voltage consisting of a circuitcontaining a source of low voltage current, a self induction and a switching device having three movable contacts adapted to be engaged with fixed contacts one after the other, the first of said contacts arranged in the circuit and adapted to make and break the same, the second contact also being included in a circuit, a condenser arranged in the circuit controlled by the second contact said contact switching the condenser in the circuit containing the self -induction coil and armature and breaking said connec tion after a short period of time, a second condenser in connection with the third contact and connecting the same with the first condenser shortly after the disconnection thereof from the circuit, and a coilhaving ohmic and inductive resistance to cause a uniform discharge of high voltage currents from the second condenser, together with a third condenser connected to the third contact through said coil and adapted to take up the charge from the second condenser.

3. Means for converting direct currents of low voltage into direct currents of high voltage, consisting of a circuit containing a source of low voltage current and'a coil having self induction provided with an armature, a make and break device consisting of three contacts controlled by said armature and adapted to be operated one after the other when the armature is oscillating, the first of said contacts bein arranged in the circuit containing the coi and said source of current, a condenser connected with the second contact, said contact connecting the condenser with said circuit and disconnecting the same after a short period, a second condenser connected with the third contact, the latter connecting the same with the first condenser after it has been disconnected from the circuit, and a coil having ohmic and inductive resistance to ether with a third condenser to take up the c arge from the second condenser and to cause a uniform discharge of high voltage direct current.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EUGEN REISZ. Witnesses:

ANNEMARIE Rmsz WOLDEMAR HAUPT. 

